nelson



July 16, 1929. E. A. NELSON MULTIPLE WHEEL STRUCTURE Filed Apri1 10,1925 v U 2a H INI./ENTOR.

' EMIL. A. NELSON I in 1o.

' HQ 2 ATTORNEY.-

Patented July 16, 1929.

f UNITED STATES I 1,721,278 PATENIM'OFFIQE.

EMILQA. NELSON, or ABING'IYON, PENNSYLVANIA, ASSIGNOR T Bonn WHEEL 00M-PANY, OF PHILADELPHIA, PEN1\Ts LvANIA,'A CORPORATION OF PENNSYLVANIA.

MUTIPLE-WHEEL STRUCTURE.

Application filed April 10, 1925." Serial No. 22,153.

My invention relates to multiple wheels l and particularly to those ofthe multiple disc type embodying a-plurality of parallel disc wheelconstructions operating upon a common wheel axis and-usually upon acommon wheel hub.

Its prime object is to produce a structure of extreme lightness withoutimpairing inany degree the sturdiness of and durability of a light discwheel.

A further object is to achieve a multiple wheel structure having anextended width of wheel tread whereby to insure, reliability ofoperation over irregular ground.

wheels having tapered wheel discs frusto conical in shape, which-areknown to possess very me jltorlous riding and working qual1- tiesandwhich it has not been heretofore p the discs by means-of the bordersof which feasible to embody in structures in which the objects above setforth are obtained.

The preferred form of my invention is disclosed in the accompanyingdrawings of which Figure 1 is an axial transverse section of themultiplewheel structure; Fig. 2 is an enlarged detail view .ofa part ofthe hub portion of this section; and'Fig. 3 is an-enlarged outside endview of the hub portion of the structure substantiallyon the scale usedin Fig. 2.

Numeral 10 is the hub which is illustrated.

as the driving hub keyed upon' driving axle 11. This hub issubstantially of a standard form of hub used in connection with a singledisc wheel; [It is here that a subordinate object of my invention isachieved in-the utili-zation'o'f standard single wheel equipment inbuilding up a multiple disc wheel. This standard hub is provided with aradial flange 12 having an inturned inner shoulder 13. On the inner faceof this flange andcentered by the shoulder 13 is mounted a brake drum14. Anchored tothe hub on a bolt circle centered in the axis 11 is aseries of studs 15. The anchoring is by means of a flange 16 on the studsocketed onthe exterior of the radial flange 12 of the hub and drawnhome by means of a nut'17 on the threaded end of the stud projectingthrough the radial flange 12 and the body of the I brake drum 14. Thesefeatures, too, are em bodied in. standard construction. I

But according to my invention I extend these studs axially outwardlysubstantially portions closely together. But according to Astill'further object is to embody in-a multiple wheel structure of thistype disc to clamp several demountable disc wheels together and to a hubflange by.means of a single securing means drawing their inner myinvention I space them apart. The spacing means is in the form of asplit sleeve 19 positioned on the studs intermediate the discs duringtheir assembly on the studs. These sleeves have conical ends 20whichcomplementallyengage conical sockets 21 .formed in annular seriesin the wheel discs corresponding to the annular series of the studs 15;The sockets-21 are, in fact, coined in the upset portion of the centralarea of the discs are borne upon the hub.

The inner disc 18 bears directlyagainst the outer face of the radialflange 12 by these borders, the inner ends of the conical sockets-21being free fromthe inner face. as clearly appears. The outer disc 18 isborne similarly upon an auxiliary flange 22 preferably of pressed metal.This auxiliary flange or annular member is provided with an integralinwardly extending tubular boss 23 constituting a bearing of the flangeupon the outer body of the hub 10. The outer body and this hearing 23are machine fitted together so that flange 22 is properly axiallyaligned. Flange 22 is provided with an annular series of apertures inregister with those of the disc 18 which it bears and an inner faceproperly formed to receive the borders of the upset portion 220f thedisc. The apertures in flange 22, however, are like those in the discsthemselves, conically formcd from the exterior as at 24.

The outer ends of the studs 15 which pass through these apertures areprovided with' with respect ,to the driving axis, andeffectuallyelin'iinate both lost motion and all tendencyto work loose. vThe inner disc wheel 18projects inwardly housing the brake drum 14,while the outer disc wheel projects outwardly, spacing the aims of thewheels apart a distance still greater than the centers, since both discsare conical in the direction in which the wheels project.

\Vith dition of merely the elongated studs 15, the spacers 19, and theflange 22, only a standard equipment of the single disc wheel is neededto produce this multiple wheel. It renders this wheel essentially cheapto manufacture, most readily assembled and knocked down, and gives it aremarkable degree of adapt-ability. To remove either disc \vhcel one hasonlyto remove the single set of nuts 25 on the exterior of the outerwheel, no greater in number than those usually provided for a singlewheel, and then to slip off the flange 22.

In order to provide againstpossible setting oi? this flange 22 on thehub 10 through corrosion, the introduction of foreign substances, or thelike, I provide an annular groove 26 (shown in detail in Fig. 2) on theexterior of the body of the hub at the same time this body is machined,and introduce lubricant to this channel by. a wick 27 the body 28 ofwhich is housed Within the hub cap 29, This hub cap is threaded on thebut slight modification and the adouter end of the hub structure asusual, but the end portion 80 is slightly reduced in diameter wherebythe threads ares paced apart from the'interior of boss 23 and thepresence of this boss does not interfere with the application of the hubcap in any way. The

interior of the cap contains lubricant which may be placed therein orwhich, when the hubs contain lubricated anti-fricti0n bearthe boltsbetween the discs andgripping the v bolts when the bolts are fast. y Amultiple wheel comprising a Wheel hub, a pair of wheel discs spacedapart throughout their extent and having tapered sockets therein,through-bolts in the sockets to draw them together, and spacers in theform of split sleeves surrounding said through-bolts and clamped to thethroughbolts through engagement of their ends. 1

' within the tapered sockets.

In testimony whereof I signature.

hereunto afiix my EMIL. A. NELSON.

